Very true, but in this case the Lloyds IT staff that came to assess the Halifax systems all thought they were going to be made redundant when they saw ours and were convinced the migration was going to go the other way. Only the Halifax mortgage system was kept in the end.
Once we started...
The volume of data and number of systems involved there will be many many more than 1 of each.
I was working for Halifax when it was taken over by Lloyds. It took years and hundreds/thousands of staff to convert the Halifax accounts onto the Lloyds' systems. This was despite the fact that all...
As part of the former LloydsTSB banking group they were still using the Lloyds IT systems. The transfer (not simply websites) was a complete data migration (that didn't go so well) from the Lloyds IT systems to the new owners Sabadell's (Spanish bank) IT systems.